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The direction angles of the line x=4z+3,...

The direction angles of the line `x=4z+3,y=2-3z" are "alpha,betaandgamma`, then `cosalpha+cosbeta+cosgamma`=_____.

A

`(2)/(sqrt(26))`

B

`(8)/(sqrt(26))`

C

1

D

2

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The correct Answer is:
A
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TARGET PUBLICATION-LINE-Competitive Thinking
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